Java tutorial
/** * Warlock, the open-source cross-platform game client * * Copyright 2008, Warlock LLC, and individual contributors as indicated * by the @authors tag. * * This is free software; you can redistribute it and/or modify it * under the terms of the GNU Lesser General Public License as * published by the Free Software Foundation; either version 2.1 of * the License, or (at your option) any later version. * * This software is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this software; if not, write to the Free * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA * 02110-1301 USA, or see the FSF site: http://www.fsf.org. */ /* * Created on Jan 15, 2005 */ package cc.warlock.rcp.ui; import org.eclipse.jface.resource.JFaceResources; import org.eclipse.swt.events.PaintEvent; import org.eclipse.swt.events.PaintListener; import org.eclipse.swt.graphics.Color; import org.eclipse.swt.graphics.Font; import org.eclipse.swt.graphics.FontData; import org.eclipse.swt.graphics.Point; import org.eclipse.swt.graphics.Rectangle; import org.eclipse.swt.widgets.Canvas; import org.eclipse.swt.widgets.Composite; /** * @author Marshall * * This is a custom progress bar that mimics the L&F of StormFront's status bars. * It's sort of a dirty hack, but it suffices for now. It needs to handle being in a LayoutManager better... */ public class WarlockProgressBar extends Canvas { private Font progressFont; private String label; private Color foreground, background, borderColor; private int min, max, selection; private int width, height; private int borderWidth; private boolean showText; public WarlockProgressBar(Composite composite, int style) { super(composite, style); // defaults width = 100; height = 15; showText = true; Font textFont = JFaceResources.getDefaultFont(); FontData textData = textFont.getFontData()[0]; int minHeight = 8; progressFont = new Font(getShell().getDisplay(), textData.getName(), (int) Math.max(minHeight, textData.getHeight()), textData.getStyle()); foreground = new Color(getShell().getDisplay(), 255, 255, 255); background = new Color(getShell().getDisplay(), 0, 0, 0); borderColor = new Color(getShell().getDisplay(), 25, 25, 25); borderWidth = 1; addPaintListener(new PaintListener() { public void paintControl(PaintEvent e) { Rectangle bounds = getBounds(); int barWidth = 0; int fullBarWidth = bounds.width - 2 * borderWidth; int fullBarHeight = bounds.height - 2 * borderWidth; if (max > min) { double decimal = (selection / ((double) (max - min))); barWidth = (int) Math.floor(decimal * fullBarWidth - 1); } Color gradientColor = getGradientColor(25, true); e.gc.setBackground(gradientColor); e.gc.setForeground(background); e.gc.fillGradientRectangle(borderWidth, borderWidth, barWidth, fullBarHeight, false); e.gc.setBackground(borderColor); e.gc.fillRectangle(borderWidth + barWidth, borderWidth, fullBarWidth, fullBarHeight); e.gc.setForeground(borderColor); e.gc.setLineWidth(borderWidth); e.gc.drawRectangle(0, 0, bounds.width, bounds.height); if (showText && label != null) { e.gc.setFont(progressFont); Point extent = e.gc.textExtent(label); int left = (bounds.width - 2 * borderWidth - extent.x) / 2; int top = (bounds.height - 2 * borderWidth - e.gc.getFontMetrics().getHeight()) / 2; e.gc.setForeground(foreground); e.gc.drawText(label, left, top, true); } } }); } private Color getGradientColor(int factor, boolean lighter) { int red = 0; int green = 0; int blue = 0; if (lighter) { red = background.getRed() < (255 - factor) ? background.getRed() + factor : 255; green = background.getGreen() < (255 - factor) ? background.getGreen() + factor : 255; blue = background.getBlue() < (255 - factor) ? background.getBlue() + factor : 255; } else { red = background.getRed() > factor ? background.getRed() - factor : 0; green = background.getRed() > factor ? background.getRed() - factor : 0; blue = background.getRed() > factor ? background.getRed() - factor : 0; } return new Color(getShell().getDisplay(), red, green, blue); } public void setSize(int width, int height) { this.width = width; this.height = height; redraw(); } public Point computeSize(int wHint, int hHint, boolean changed) { return new Point(width, height); } public void setForeground(Color color) { foreground = color; redraw(); } public void setBackground(Color color) { background = color; redraw(); } public void setLabel(String label) { this.label = label; redraw(); } public void setMinimum(int min) { this.min = min; } public void setMaximum(int max) { this.max = max; } public int getSelection() { return selection; } public void setSelection(int selection) { this.selection = selection; redraw(); } public void setShowText(boolean showText) { this.showText = showText; redraw(); } public void dispose() { background.dispose(); foreground.dispose(); progressFont.dispose(); super.dispose(); } public Color getBorderColor() { return borderColor; } public void setBorderColor(Color borderColor) { this.borderColor = borderColor; } public int getBorderWidth() { return borderWidth; } public void setBorderWidth(int borderWidth) { this.borderWidth = borderWidth; } }